of chicago



H. B. IMES LIETING JACK April 20 19 26.

2 Sheets-Sheet 1 Original Filed June 28 1920 A ril 20 1926. R 16,327

H.'B. [MES LIFTING- JACK Original Filed June 1920 2 Sheets-Sheet 2 gang Reiseued Apr. 2 0, 1926.

UNITED STATES PATENT OFFICE.

HARRY B. nuns, or CHICAGO, ILLmoIs, ASSIGNOR 'ro JOHN w. HILL, or CHICAGO,

' ILLINOIS.

LIFTING JACK.

Original 1T0. 1,409,861, datedlMarch 14', 1922, Serial 1%. 392,191, filed June 28, 1926. Application for i reissue filcd November 7, 1925. Serial No. 67,701.

To ail whom it may concern.

Be it known that I, HARRY B. IMES, a citizen of the United States, residing at Chicago, in the countyof Cook and State of 6 Illinois, have invented certain new and useful Improvements in Lifting Jacks, of which the, following is a description.

' My invention belongs to that general class of devices known as lifting jacks, and has for. its object the production of such adevice that will be effective and reliable in its operation, and which'will improve and increase advantages over devices of this character heretofore available.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a side elevation of the preferred form of my device;

Figure 2 is a top plan view of the same;

Figure 3 is a vertical-sectional view on lin'e 3'3 of Figure 2;

Figure 4 is a vertical sectional view on line 44of Figure 1, showing the jack extended to substantially its limit of move- Figure 5 is .a top plan View ofa rotatable sleeve supported upon the standard;

Figure 6 is an edge view of the same showing a part/of the cooperating threaded sleeve; and v Figure 7 1s a cross sectional view substantrally-on line 77 of F igure 6.

In the drawings showing the preferred 3,; embodiment of my device, 1 represents a supporting column provided with a suitable base 2 and formed with a cylindrical opening extending longitudinally therein as at 3.

A collar 4 formed to be loosely positioned within the cylindrical opening 3, carries upon its upper end a. transversely extending beveled gear member 5, which is adapted to rest upon the upper end of the'base 1 in such manner as to be freely rotated there- 15 on. As shown in Figure 4, ball bearing 6 or equivalent friction reducing members! may be interposed between the member 5 and. the upper end of the standard. The

collar 4 is internally screw-threaded, as in- 5 dicated in Fi ures 4 and 6, for a purpose which will be ereafter described.

A bracket 7 is carried by the standard 1',

rovided with a shaft 8 extend from the Bracket to the body :of the sta zi d '24 extending in the same direction. 'upper end of the supplemental bar 25 is rd, upon which is mounted the cooperating beveled gear 9 arranged to'engage the gear 5. Any

- preferred means may be employed to enable the gear 9 to be readily rotated so as to rotate the gear 5 and its collar 4. As shown, the gear 9 has formed integrally therewith a cog-wheel 10, forming a ratchet to cooperateiwith a suitable pawl carried by an operating lever. with an extension 12 loosely mounted on the shaft 8 and extended as at 13 to receive a suitable operating handle 14. 15 is a spring site direction, whereupon the reciprocation of the handle will cause the collar to rotate in tlie opposite direction. By this means the handle may be reciprocated to rotate the collar 4 to secure the lifting effect, or when it is desired to release the jack, by operating the pawl as described, {lowering the 11 is a pawl lever provided lifting bar and tending to release the ack. r55

In the preferred form illustrated, the lifting baris'telescopically formed, providing a plurality of members arranged to engage one another to secure that effect. 21 is ,a sleevescrew-threaded on its exterior as at 22 to engage the interior threads on the collar 4, and screw-threaded upon .its interior as at 23 a sufficient distance to provide secure engagement with the screw-threads 24 upon the exterior of the cooperating supplemental lifting bar 25, the threads 22 and The provided with an engaging plate 26, or its equivalent, arranged to contact with the bod to be lifted.

T e engaging late 26 is removable from the bar' 25, allowing the latter to be placed in threaded engagement'with the sleeve 21 from the bottom of the'latter, the bar 25; }provided with an enlarged section 27 being or wit an equivalent arrangement so as to limit the upward movement of'the bar and the sleeve 21. The

engagement. A collar 30 is secured upon the upper end of the sleeve 21 in any preferred manner, and provided with an extending stop 31 which, as the sleeve reaches its lower limit of movement, engages with the stop 32 carried upon the upper face of the member 5, thus limiting rotation in that disis , shown in rection. A cap piece 33 is adapted to be placed over the upper end of the telescop-V ing parts, and is provided with-a central openng through whichthose parts may exten The cap piece is secured to the base in any preferred manner, for illustration, by means of bolts 34.

Assumin that the tool is in the position ig. 3, the reciprocation of the lever 14 will rotate the integral pivotal gear and collar to the right. Bearing in mind that the bar 25 is held non-rotative by its engagement with the load to be lifted, or by other 'means, until it is placed against said load, it is obvious that the rotation of the gear 5 will also rotate the sleeve 21, because there is nothing to hold said sleeve from such rotation, and further, the friction between the sleeve and gear at the cooperating threads,'which is induced by the load, increases the tendency of the gear and sleeve to rotate as-one.

Therefore, the gear and sleeve act together as a nut, considering the bar 25 as the bolt. It is a well known mechanical law that when a bolt is held non-rotative and the nut is kept from sliding but is freely rotatable, then any rotation of the nut causes the bolt to move axially. In the same manner the rotation of the gear and sleeve as a nut causes the bar 25 to be moved axially until the enlarged end 27 wedges against or abuts the lower thread 23, limiting thedn' dependent movement of'the sleeve and bar. Then the sleeve 21 changes in its action from a nut to a bolt and forms-inefl'eot an extension of the bar 25, because although the gear 5 still tends to rotate the sleeve 21,

such rotation would be in a direction relatively downward of the lower end of the bar 25 and as such movement is prevented by the enlargement 27, the sleeve can only move axially with the bar 25. -Therefore, the continued rotation of the gear 5 in the same direction causes the sleeve and bar to lift as one, as said gear is held against axial movement by the cap 33 and acts as a nut. This will continue unt l he slee e rea hes the lim t 9f it movement and the extension 28 engages with the shoulder 29, looking the parts together and preventing any further rotation of the collar. This makes the limit of movement of the lifting elements of the jack.

Pulling the pawl outward and turning it one-half rotation will bring it in thereverse engagement with the cog-rack or ratchet 10'. The reciprocation of the lever will then cause the reverse movement of the parts just described, and they will assume their original position.

35 is simply a handle formed 'integrallv with the standard for convenience in handling the device.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence I do' not wish .to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and tioned.

I claim as my invention:

1. In a lifting jack adapted to contact with the body of an automobile to be lifted, I

ments of said members relative to said collar. I

2. In a lifting jack for automobiles and in combination, a supporting base formed with a vertically extending opening therein,

a sleeve member internally threaded to en- III gage a telescoping supplemental lifting bar A member, a supplemental liftingbar member disposed within said sleeve member and externally threaded to engage said sleeve mem'- ber, saidxsupplemental lifting bar member having at its upper end an engaging plate to contact with the body to be lifted, means for automatically effecting successive axial move.- ments of said members relative to the base, means comprising a collar rotatably supported upon the base, and cooperating external and internal threads carried by said sleeve and said collar respectively, .means for rotating said collar, and movement limiting means for said sleeve and supplemental lifting bar member mounted upon said arts. p 3. A lifting jack ada t aut mobi es t9 e a 5 ed for use beneath e same comprising a vertically disposed supporting base formed with a longitudinally extending opening therein, an internally threaded collar rotatably supported upon the upper end of the base, a cooperating sleeve member externally threaded to engage with the thread in the collar and internally threaded to engage a telescoping supplement-a1 lifting bar member, a'supplemental lifting bar member externally threaded to engage said sleeve member, and means controlled by, the lifting members for automatically effecting successive axial movements thereof.

1. A lifting jack adapted for use underneath automobiles to elevate the same, comprising a supporting base formed with a vertically extending passage therein, a sleeve member externally threadedadapted to engage with the thread in a collar and internally threaded to engage a telescoping supplemental lifting bar member, a supplemental lifting bar member externally threaded to engage said sleeve member, said supplemental lifting bar member having a provision upon. its upper end adapted to engage the load, means for automatically effecting successive elevation of said members, one ata time, said means comprising a collar rotatably supported upon the base and internally threaded to engage with the externally threaded portion of said sleeve member, and provisions for preventing disengagement'of said members and said collar during upward 'elevational movement of said members, and means fonrotating said collar.

5. A lifting jack for automobiles, comprising a vertically disposed supporting base formed with an elongated vertically extending opening therein, a collar rotatably supported upon the base, nested cooperating sleeve and lifting bar members mounted in the collar, connections between said members and said collar whereby said members are automatically and successively elevated, one at a time, when the collar is continuously rotated in one direction, said lifting barv member having at its upper end a part to engage the load above the collar, and means for rotating said collar.

6. A lifting jack for automobiles, comprising a supporting base formed with a vertically extendin cylindrical opening therein, an internally threaded collar r'otatably supported within said openin and having a part loosely resting upon the upper end of thebase, a cooperating sleeve member externally threaded to enga e with the thread in the collar and internal y threaded to engage a telescoping supplemental lifting bar member, a supplemental lifting bar member externally threaded to engage said sleeve member, a load-engaging plate carried by the lifting part to contact with the load above the collar, and movement limiting means controlled in accordance with the position of the lifting members themselves prising a standard provided with a vertically extending opening, a sleeve member threaded upon the exterior to engage a nut and internally threaded to engage a sup'-. plemental lifting bar, a supplemental lifting bar externally threaded to engage the sleeve, :1 rotatablenut non-tiltably supported by the standard engaging the external threads of the sleeve, means for rotating the nut in either direction at will, said lifting bar having at its upper end a plate shaped to engage the load to be lifted above the nut, and stopping means arranged to limit the move ment of the sleeve in relation to the nut, and auxiliary stopping means arranged to limit the movement of the lifting bar in relation to the sleeve member.

.8. A lifting device adapted to be placed underneath. automobiles to elevate the same, comprising a supporting base formed With a vertically extending opening therein, a nut member non-tiltably and rotatably supported by the base, and means for rotating the nut member in either direction at will, in combination with an elevating sleeve externally threaded to engage the nut member and internally threaded to engage a cooperating elevating member, a cooperating elevating member threaded to engage the internal threads of the sleeve, said cooperating elevating member having a lifting plate to engage beneath the load above the nut, and stopping means arranged to limit the movement ofthe sleeve in relation to the nut member, and stopping means arranged to limit the movement of the cooperating member in relation to the sleeve member, whereby upon rotating the nut member in one direction one of the elevating members will be elevated to the limit of its movement and thereafter the other elevating member will be automatically elevated return the elevating members to their original position.

9. A lifting jack comprising, a supporting base formed with a vertically extending opening therein, an internally threaded collar rotatably supported upon the base, means for rot-ating said collar, a cooperating sleeve member externally threaded to engage with the thread in the collar and internally threaded to engage a. telescoping supplemental lifting bar member, a. supple}. mental'lifting bar externally threaded to engage said sleeve said lifting bar having provisions at its upper end for enga 'ng the load, and cooperating means carried means forrotating said collar, a cooperating sleeve member externally threaded to engage with the thread in the collar'and ing rotation thereof relative to sai ing base forme internally threaded to engage a telescoping supplemental lifting bar member, a supplemental lifting bar externally threaded to engage said sleeve said lifting bar having provisions at its upper end for engaging the load, and cooperating means carried by the threaded collar and the sleeve for preventing rotationof the outer sleeve in one direction only relative to, the collar when at either limit of its travel.

11. A lifting 'ack comprising, a supportd with a vertically extendopening therein, an internally threaded 1 cofiar rotatably supported upon the base, means for rotating said collar, 'a coperat-' ing sleeve member externally-threaded to engage with the thread in the collar and internally threaded to engage a telescoping supplemental lifting bar member, a supplemental liftin bar externally threaded to e said S eeve said lifting bar having PI'OVlSlOIlS at its upper end for engaging the load, and means. for automatically causing successive elevation of said members, comprisin means controlled by a position of one o said members for 'reventcollar.

12-. A lifting jack comprising, a support ing base formed with a vertically extending opening therein, an internally threaded collar rotatably supported upon the base, means for rotating said collar, a cooperating sleeve member externally threaded to engage with the thread in the collar and internally threaded to engage a telescoping supplemental lifting bar member, a supplemental lifting bar externally threaded to engage said sleeve said lifting bar having provisions at its upper-.end for engaging the load, and automatic means for causing in advance of the other during both extension and retraction of the jack.

13. A lifting jack comprising, a supporting base formed with a vertically extending opening therein, and internally threaded collar rotatably supported upon the base, means forrotating said collar, a 00- operating sleeve member externally threaded to engage with the thread in the collar and internally threaded to engage a telescoping supplemental lifting bar member, a supplemental liftin bar externally threaded to engage said e provisions at its upper end for engaging the load, and automatic means for causing successive axial movement of said members, one of said members movingaxially" in a d vance of the other during extension of the jack, and said same member moving in ad vance of the other during retraction of the ack.

14. A lifting jack for automobiles, comprising an upright supporting base or standardfdrmed with an elongated vertically extending opening therein, an internally threaded collar loosely positioned insaid opening for rotatable movement and having a art supported upon the upper end of sai collar, a cooperating sleeve member externally threaded to engage with the thread in the collar and internally threaded to enage a telescoping supplemental lift-ing ar, asupplemental lifting bar externally threaded to engage said sleeve and having at its upper end provisions to directly engage the load thereabove, and means carried by" said into play at e upper, limit of travel of said outer sleeve for positively preventing rotation of the same'm one direction.

HARRY B. IMES. p

eve said lifting bar having base, means forrotating said-' parts automatically brought t 

